Bobbin stop motion



Aug. 1, 1933. H. HOWORTH BOBBIN STOP MOTION Filed Aug. 20, 1931 INVENTQR Harmon HQWOY'ih Patented Aug. 1, 1933 BOBBIN STOP MOTION Harmon Hey/01 th, Cumberland, Md, assignor'to Celanese Corporation of America, a Corporation of Delaware Application August 20, 1931. Serial No. 558,263

' 2 Claims. (Cl. 24289.)

The present invention relates to a novel stop motion device and more particularly to a full bobbin stop motion device for use in connection with winding thread of yarn from a delivery package onto a take-up bobbin. In the illustrated preferred embodiment, the invention is shown applied to a tai e-up bobbin on a backwinding or redraw machine.

An object of the invention is the provision of novel means for automatically arresting the winding motion of the take-up bobbin after a predetermined yardage of thread or yarn had been wound thereon.

Another object of this invention is to provide a novel stop motion device which may be readily attached to standard redraw machines without in'v'olvin any alterations thereto and without interfering with the normal operation thereof.

Other objects and advantages of this inventlon will be apparent from the following detailed description and the appended claims.

In the drawing:

Figure 1 is a view in perspective of a portion of a backwinding or redraw machine with the invention embodied therein;

Figure 2 is a View taken on line 2-2 in Figure 1; a

Figure 3 is a view similar to Figure 2 showing the full bobbin resting in inoperative position;

Figure 4i is a front elevational View, partly in cross-section, of my novel device; and

Figure 5 is a View on reduced scale of a modification of my invention.

Similar characters of reference indicate corresponding parts throughout the several views.

Referring more particularly to the drawing, there is shown a section of a redraw machine the supporting bars 5 of which extend substanbobbins 6, only one of which is shown in the.

drawing. Each bobbin is removably mounted on a spindle 7, the extremities of which are journaled in bearings 8 formed in the free ends of bearing fingers 9 secured to bars 5 in any suitable manner, as by clamps 11. During the winding of the thread or yarn from the delivery package (not shown) onto the take-up bobbin, the latter is rotated by means of a steel pulley 12 fixed to a driven shaft 13, the pulley being adapted to frictionally engage and drive a wooden boss 14. rigidly secured to the spindle on which the bobbin 6 is carried.

The device of my invention is a casting in the form of an angle iron, generally indicated by the art.

the reference numeral 15, the vertical arm 16 01" Q which is provided with a vertical slot 17 for a purpose hereinafter set forth. On one side of the horizontal arm 18 of the casting and adjacent the free end of said arm there is provided a tapped aperture 19 which is adapted to receive a machine screw 21. A roller 22, which is preferably of wood although any other suitable material may be used, is eccentrically journaled on said screw. The roller is provided with a covering 23. While this covering may be of any suitable material which will not damage the yarn on the package when the periphery of the roller comes in contact therewith, I prefer to use a covering of cork which has a coefiicient of friction suitable for the purpose desired.

In attaching my novel device to the backwinding or redraw machine, the vertical arm 16 of the I casting is placed against the supporting bars 5 and a bolt 24 is passed-through the slot 17. The horizontal arm 18 carrying the roller 22 is then adjusted to the desired position and the device is secured in the adjusted position by means of a clamp 25 and nut 26. The roller 22 should preferably be about one-eighth of an inch from the inner surface of flange 2'? of the bobbin 6 and at a tangent with the periphery of the full package.

In the modified form of construction shown in Figure 5, I have provided an arrangement which allows for a greater range of adjustment. This modification comprises a casting 29, similar to casting 15, but which is provided with horizontally extending slots 31 in the end walls of which are formed apertures 32. While only two of such I slots are shown, it is to be understood that any desired number may be provided. An easily removable pin 33 is adapted to be received in said apertures, and mounted on said pin is an arm 34 on the free end of which is carried a roller 35, eccentrically journaled in the same manner as roller 22. The horizontal arm 36 carries a set screw 37 by which arm 34 and thereby rollor 35 may be adjusted relative to the bobbin, the

set seven being retained in adjusted position by means of a lock-nut 38, as is well understood in.

By this construction the roller may be given an initial adjustment relative to the bobbin by mounting arm 34 in one of the slots 31 and then given a final and accurate adjustment by means of set screw 37. Thus also changes from one size package to another can easily and quickly be made merely by adjusting the height of arm 34 by means of set screw 3'7.

In operation, when the yarn on the bobbin has attained the predetermined diameter, the periphery of the package comes in contact with the roller 22 whereby the rolleris caused to turn in such a manner that it lifts'the bobbin out of contact with the frictionpulley 12, the end of the spindle 7 falling into a groove 28 formed in bearing finger 9. The operative then removes the full bobbin and replaces it with another.

It will thus be seenthat by the construction outlined above, I have provided a simple and inexpensive attachment for backwinding or redraw machines which automatically stops the winding of the take-up bobbin when it has received the desired yardage of yarn thereon and no waste of yarn results in the process. Another feature of my invention is that all the packages inay have substantially the same yardage of yarn, if it is so desired. e

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made withoutdeparting from the scope thereof it is I intended that all matter contained in the above ment for redraw. machines comprising a casting having a plurality of slots therein, an arm having. a reduced portion pivotally mounted in one of said slots, a roller carried by said arm and means including a set screw in said casting for adjusting the height of said arm.

HARMON HOWORTH.

IOU 

